From 78004e9a87f240df03e2f73120d291763c32e0a7 Mon Sep 17 00:00:00 2001 From: Ali Ahmet Memis Date: Fri, 21 Aug 2026 01:45:27 +0000 Subject: openrisc: fix arbitrary kernel memory access via or1k_atomic syscall sys_or1k_atomic() (syscall 244 in the "or1k" ABI) takes two user pointers, v1 and v2, and swaps the words they point to in hand-written assembly. l.lwz r29,0(r4) l.lwz r27,0(r5) l.sw 0(r4),r27 l.sw 0(r5),r29 The pointers are not checked with access_ok(). The four memory accesses also have no exception table entries. A caller passes a kernel address as either pointer, and the syscall reads from and writes to it directly. This gives an unprivileged process a kernel read/write primitive. It overwrites kernel data such as the sys_call_table, gaining code execution in kernel context. Check both pointers before entering the critical section. Add fixups for the four memory accesses so faults on valid but unmapped user addresses return -EFAULT. [shorne@gmail.com: fix comment style] Fixes: 9d02a4283e9c ("OpenRISC: Boot code") Cc: stable@vger.kernel.org Signed-off-by: Ali Ahmet Memis Signed-off-by: Stafford Horne --- drivers/pinctrl/mediatek/Makefile | 44 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 drivers/pinctrl/mediatek/Makefile (limited to 'drivers/pinctrl/mediatek/Makefile') diff --git a/drivers/pinctrl/mediatek/Makefile b/drivers/pinctrl/mediatek/Makefile new file mode 100644 index 000000000..6dc17b0c2 --- /dev/null +++ b/drivers/pinctrl/mediatek/Makefile @@ -0,0 +1,44 @@ +# SPDX-License-Identifier: GPL-2.0 +# Core +obj-$(CONFIG_EINT_MTK) += mtk-eint.o +obj-$(CONFIG_PINCTRL_MTK) += pinctrl-mtk-common.o +obj-$(CONFIG_PINCTRL_MTK_V2) += pinctrl-mtk-common-v2.o +obj-$(CONFIG_PINCTRL_MTK_MTMIPS) += pinctrl-mtmips.o +obj-$(CONFIG_PINCTRL_MTK_MOORE) += pinctrl-moore.o +obj-$(CONFIG_PINCTRL_MTK_PARIS) += pinctrl-paris.o + +# SoC Drivers +obj-$(CONFIG_PINCTRL_MT7620) += pinctrl-mt7620.o +obj-$(CONFIG_PINCTRL_MT7621) += pinctrl-mt7621.o +obj-$(CONFIG_PINCTRL_MT76X8) += pinctrl-mt76x8.o +obj-$(CONFIG_PINCTRL_RT2880) += pinctrl-rt2880.o +obj-$(CONFIG_PINCTRL_RT305X) += pinctrl-rt305x.o +obj-$(CONFIG_PINCTRL_RT3883) += pinctrl-rt3883.o +obj-$(CONFIG_PINCTRL_MT2701) += pinctrl-mt2701.o +obj-$(CONFIG_PINCTRL_MT2712) += pinctrl-mt2712.o +obj-$(CONFIG_PINCTRL_MT8135) += pinctrl-mt8135.o +obj-$(CONFIG_PINCTRL_MT8127) += pinctrl-mt8127.o +obj-$(CONFIG_PINCTRL_MT6765) += pinctrl-mt6765.o +obj-$(CONFIG_PINCTRL_MT6779) += pinctrl-mt6779.o +obj-$(CONFIG_PINCTRL_MT6795) += pinctrl-mt6795.o +obj-$(CONFIG_PINCTRL_MT6797) += pinctrl-mt6797.o +obj-$(CONFIG_PINCTRL_MT6878) += pinctrl-mt6878.o +obj-$(CONFIG_PINCTRL_MT6893) += pinctrl-mt6893.o +obj-$(CONFIG_PINCTRL_MT7622) += pinctrl-mt7622.o +obj-$(CONFIG_PINCTRL_MT7623) += pinctrl-mt7623.o +obj-$(CONFIG_PINCTRL_MT7629) += pinctrl-mt7629.o +obj-$(CONFIG_PINCTRL_MT7981) += pinctrl-mt7981.o +obj-$(CONFIG_PINCTRL_MT7986) += pinctrl-mt7986.o +obj-$(CONFIG_PINCTRL_MT7988) += pinctrl-mt7988.o +obj-$(CONFIG_PINCTRL_MT8167) += pinctrl-mt8167.o +obj-$(CONFIG_PINCTRL_MT8173) += pinctrl-mt8173.o +obj-$(CONFIG_PINCTRL_MT8183) += pinctrl-mt8183.o +obj-$(CONFIG_PINCTRL_MT8186) += pinctrl-mt8186.o +obj-$(CONFIG_PINCTRL_MT8188) += pinctrl-mt8188.o +obj-$(CONFIG_PINCTRL_MT8189) += pinctrl-mt8189.o +obj-$(CONFIG_PINCTRL_MT8192) += pinctrl-mt8192.o +obj-$(CONFIG_PINCTRL_MT8195) += pinctrl-mt8195.o +obj-$(CONFIG_PINCTRL_MT8196) += pinctrl-mt8196.o +obj-$(CONFIG_PINCTRL_MT8365) += pinctrl-mt8365.o +obj-$(CONFIG_PINCTRL_MT8516) += pinctrl-mt8516.o +obj-$(CONFIG_PINCTRL_MT6397) += pinctrl-mt6397.o -- cgit v1.3.1